Portable bit-dressing tool



Jan. 28, 1930. c. H. BERGQUIST PORTABLE BIT DRESSING TOOL INVENTOR 'yucls.

fl-M A ORNEY Filed a 1925 2 Sheets-Sheet l (Znfiaimero :gzzgzzzzi Jan. 28,, 1930. c. H. BERGQUIST 1,745,143

PORTABLE BIT DRESSING TOOL Filed Aug. 31, 1925 2 Sheets-Sheet 2 2 6 killllllt-:ih, Milli! INVENTOR C'bai'JeflHBelg'gua,

Patented Jan. 28, 1930 UNITED STATES PATENT OFFICE CHA'HLES H. BERGQUIS'I', vO13 OKMULGEE, OKLAHOMA, ASSIGINOR OF ONE-HALF TO EMEBY A. LOCKE, OF OKMULGEE, OKLAHOMA PORTABLE BIT-DRESSING TOOL Application filed August 31, 1925.

This invention relates to portable hammers or rams especially adapted for use in dressing the bits of cable tools employed in drilling wells.

An important object of this invention is to provide a hammer or ram which may be employed at ornear a well derrick for dressing the bits as they are dulled.

A further object is to provide a bit-dress- 'ing hammer having simple means whereby the delivery of the power from the power unit to the striking element will not unnecessarily strain the hammer or any of the parts thereof regardless of whether the bit receives the intended blow.

The invention has for another and equally important object the provision of a strictly portable tool-dressing hammer which may be operated without the exercise of unusual skill and which will utilize many of the facilities available at the immediate scene of a drilling operation.

A further aim of the invention is to provide a novel form of power unit capable of delivering a powerful blow to the striking element or ram, and a novel form of valve arrangement by means of which a fluid under pressure may be supplied to expansion chambers and employed to yieldingly limit the stroke of the piston.

Another object is to provide a portable ram or hammer of the character specified which is simple to operate, durable in use, and cheap to manufacture as compared with 5 the other known hammers on the market. Other objects and advantages will be apparent during the course of the following description. In the accompanying drawing forming a part of this application and in which like numerals are employed to desig' nate like parts throughout the same,

Fig. 1 is :a side elevation of the improved portable bit-dressing apparatus in use,

Fig. 2 is a group perspective illustrating the holding means for the portable hammer;

Fig. 3 is a group perspective illustrating a supporting and universal anchoring mecha" nism embodied in the invention;

Fig. i is a fragmentary side elevation of Serial No. 53,636.

the improved portable bit-dressing tool, the power unit being in section;

Fig. 5 is a fragmentary side elevation illustrating a slight modification of the invention, the modification residing in the valveactiiiating mechanism;

Fig. 6 is sectional perspective illustrating the valve-actuating mechanism shown in Fig. i; and

Figure 7 is a perspective of an anvil embodied in the invention.

1111 the drawing the numeral 5 designates a portion. of a derrick frame, and the numeral 6 designates what may be the derrick crane. matter of this application is designed for use at a drilling operation although it is capable of use at a shop or at any other place found desirable. A chain hoist 7 of conventional construction may be employed to position a bit 8 upon an anvil 9 and another sup port 10, so that the end of the same may be dressed by the improved portable bitdressing tool as shown in Fig. 1. Of course,

during the dressing operation the stem of the bit may be backed up by a suitable member 11.

The improved portable hit-dressing tool comprises a tubular guide 14 having its rear end connected by fastening devices 15 to the forward end of a cylinder 16. The adjacent ends of the tubular guide 14: and the cylinder 16 have flan es 17 provided with openings for the reception of the fastening devices 15. It is thus seen that the cylinders 14 and '16 are in alinement to receive a piston rod 18, the rear portion of which is rigidly connected to a piston 19.

It is believed to be obvious that the piston is reciprocated in the cylinder 16 to impart a similar movement to the piston rod '18, the forward. portion of which has rigid connection with a head 20.

Referring now to Fig. 2, it will be seen that the head 20 is confined within a ram barrel '21 and between suitably stout compression springs 22. A die or ram head 23 is attached by any suitable means 24to the forward portion of the ram barrel 21, the means 241 also acting as a stop for the forward compression The invention forming the subject spring 22. The rear compression spring 22 is engaged with the rear side of the head 20 and with a closure member 27 which may be secured in any suitable manner to the rear portion of the ram barrel 21.

The reciprocatory movement imparted to the head 20 will result in the reciprocation of the ram barrel 21 and the die head or striking element 23. However, due to the presence of the springs 22, the transmission of the power from the head 20 to the die head will be accompanied by a definite cushioning action which will substantially reduce the strain on the ram and the power unit. In case the object struck by the striking element 23 does not yield or give, no damage to the improved ram will result as the forward compression s ring 22 will absorb the back pressure. On t e return movement of the ram barrel 21 the rear spring 22 will be compressed to an ex tent sufiicient to relieve the other parts of the apparatus of unusual strain. It is thus seen that the ram barrel and associated elements are capable of delivering frequent powerful blows without subjecting the apparatus to destructive strains as a result of contact of the striking element with the object to be dressed and the ra id change in the direction of travel of the striking element. Also, in case the improved ram is not properly positioned and the striking element 23 fails utterly to come in contact with the object to be dressed no damage will result. This is provided for by the com ression springs 22.

Suitafile openings may be provided in the cvlinder 14 to provide for the adjustment of the various parts of the ram and for lubrication.

Attention is now directed to Fig. 4 which illustrates that the cylinder 16 is provided at points spaced from op osite ends thereof with combined intake and exhaust ports 40 by means of which steam under pressure is supplied alternately to opposite sides of the piston 19 and is expelled in the usual manner. It is known that some steam engines have the equivalent of the ports 40 spaced slight distances, generally about of an inch, from the ends of the cylinder for clearance purposes, but I space the ports 40 about 1 inches from the ends of the cylinder to provide generous-sized cushioning chambers by means oi which the stroke of the piston is limited in case it accidentally passes beyond one of the ports. This is especially important in connection with this inventon since it neutralizes the back pressure of the springs 22. However, the invention is not in any sense restricted to the particular dimensions recited.

The ports 40 communicate with the steam chest within which the valves 46 on the valve rod 47 reciprocate and allow the steam to first enter the cylinder 16 at one side of the piston and then at the other side of the piston, this feaure being perfectly clear in Fig. 4. i

The intermediate portion of the steam chest 45 is provided with a steam supply connection 48 while the ends of the steam chest are pro vided with steam exhaust connections 50. The steam supply may be taken from the boiler at the drilling operation or compressed air may be employed. It will be seen that the intake member 48 has connection with a flexible hose 52 which may extend from a suitable source of supply. A hose 53 may be connected to the exhaust members to convey the exhaust steam to a suitable point of discharge. A valve 55 of any type may be employed at any place found desirable in the steam line to control the admission of the steam to the steam chest.

Attention is directed to the fact that the steam exhaust connections 50 are spaced somewhat from the ends of the steam chest 45 to provide pockets beyond the connections 50 whereby the movement of the valves 46 beyond the connections 50 is limited to avoid destructive contact of the valves with the ends of the steam chest.

The valve rod 47 is slidable through a packing unit at one end of the valve chest and through a guide 61 mounted on the cylinder 14.

A spool-like member 62 is rigidly secured in any suitable manner to the intermediate portion of the rod 47 and is provided at the ends thereof with contact shoulders or abutments 63 against which the rocker arms 64 engage. The lower portions of the rocker arms are enlarged as indicated at 66 and are "freely received in an annular groove of a driving member 67 on the piston rod. The rocker arms are supported on a pivot element 68 carried by a suspension bracket 70. The suspension bracket 70 may be secured in any suitable manner to the cylinder 14. It will be seen that the reciprocation of the piston rod 18 will result in the rocking of the arm 64 and in the alternate engagement of the arms 64 with opposite ends of the member 62. This brings about the alternate opening and closing of the ports 40 of the steam engine. This maintains a proper opening and closing of the several ports and therefore avoids thumping.

The rear portion of the cylinder 14 is provided with trunnions connected to the lower portions of a yoke 81, the yoke being connected to a chain hoist 82. The chain hoist 82 may be suspended from the crane 6. Attention is especially directed to the fact that the trunnions 80 are located at the center of balance of the tooldressing apparatus and consequently the apparatus may be easily and conveniently swung about a horizontal axis for adjustment of the striking element with respect to the bit to be dressed. The rear portion of the power unit is provided with a sim ple handle 83 by means of which the operator may tilt the apparatus. Other handles may be employed if found desirable.

Fig. 5 illustrates a slight modification of the invention wherein it is shown that the piston rod 18 may be provided with an npwandly directed forkedarm 181 confined between springs 182, the springs being backed up by collars 183. When the main piston rod 18 is reciprocated the arm 181 will alternately engage the springs 182 and thereby operate the valves for controlling the admission or exhaust of steam.

Particular attention is directed to Fig. 3 which illustrates that the trunnions 80, which have connection with the sides of the yoke 81, have their terminal portions threaded for en gagement with hand-wheels 101 by means of which look washers 102 may be forced tightly into engagement with the bearing portions of the yoke so as to hold the hammer in an adjusted position. It will he observed that the trunnions :80 have flattened portions for engagement by the flattened inner faces of the washers 102 whereby the washers are held against turning. This avoids accidental loo eningof the hand-wheels 101. It is believed to be obvious that after the tool has been tilted to the desired position, it may be held in place by merely tightening up on both of the handwheels.

The hammer itself may be held in a desired position with respect to the work by a screwbar 105 (see Fig. 1)., the forward terminal portion of which is provided with a bill or hook 106 which engages one of the eyes 107 of the anvil 9. The rear portion of the screw-bar 105 is threaded through a sleeve 110 having a hand-wheel 111 '(see Fig. A universally mounted bearing member 112 is mounted on the sleeve andis held thereon .by a nut 114. The bearing 112 has oppositely arranged attaching trunnions or pins 113, which extend through a collar 118 at right angles to the trunnions 120 of the collar. The trunnions 120 are, in turn, rotatably connected to the lower terminal portions of the rearwardly directed extensions 122 of the yoke 81. By this arrangement the screw-bar 105 is universally connected to the depending members 122 of the yoke so that the screw-bar 105 is universally connected to the clevis. This permits the bar 105 to be easily connected to the anvil 9so as to hold the tool in a fixed'position with respect to the bit. The mechanism for connecting the tool to the anvil greatly expedites the dressing operation and relieves the operator greatly.

Fig: 7 illustrates a form of anvil which is especially adapted for use in connection with the invention, and it will be seen that the eyes 107 may be spaced about one side and the ends of the body or head of the anvil for engagement by the hook 106 of the bar 105. The top or face of the anvil may be provided with openings 14:5 to selectively receive the attaching pins 146 of holding members 148. The holding members may be adjustedon the anvil to hold the bit to be dressed in a proper position. More specifically, the members 148 provide a means whereby the bit is held against lateral movement.

In the operation of the improved bit-dressing apparatus the same is first suspended from the crane -6 and a bit is positioned as shown in Fig. 1. The operator may then position the apparatus so that the striking element 23 will be in position to contact with the forward portion of the bit when the rod 18 is reciprocated by the power unit. Particular attention is directed to the fact that the machine will remain in the posit-ion to which it is tilted so that the operator may devote his attention and energy to controlling the supply of a fluid under pressure to the expansion chambers of the engine. It is, of course, necessary for the operator to change the position of the apparatus slightly during the bit-dressing process, but once the major adjustment is made it is merely necessary to slightly move the apparatus to com pl-etely dress the bit. At this point it might be stated that steam, compressed air, or the like, may be employed in the engine.

When the valve 55 is opened the piston 19 will be reciprocated for actuating the barrel 21 and the die 23 associated therewith.

As previously stated, the presence of the may be adjusted in an arcuate path, the axis of which will be found to be at the forward end of the bit being dressed. The manner in which the hammer is swingingly suspended or supported combined with the means by which the hammer is anchored to the anvil allows of the extremely eflicient use of the hammer.

Particular attention is directed to the fact that the cushioning chambers beyond the ports 40 cooperate with and yet act independently of the springs 22, so that in case one or both of the springs break during the use of the hammer the cushioning action will not be destroyed.

The bit-dressing operation may be quickly performed at the derrick, and when the improved hammer is not in use it may be moved to an out of the way place and quickly brought into use when desired.

, The foregoing illustrates that the improved hammer is economical and may be employed in a highly expeditious manner.

The invention forming the subjectanatter of this application is capable of a wide variety of mechanical expressions, and it is therefore to be understood that the several forms of invention herewith shown and described are to be taken merely as preferred examples of the same, and that such minor changes in arrangement and construction of parts may be made as will remain within the spirit of the invention and the scope of what is claimed.

Having thus described the invention, what is claimed is:

1. A bit-dressing apparatus comprising a barrel, a striking element having rigid connection with the barrel, an actuating member in the barrel, coil springs confined between said actuating member and the ends of said barrel and constituting the sole means to establish a driving connection between the actuating member and the barrel, a tubular guide and support encasing and slidably receiving said barrel, and a power unit rigidly connected to said tubular guide and support and being in longitudinal alignment therewith, said power unit being provided with a power transmitting rod connected to said actuating member.

2. A portable bit-dressing apparatus comprising a barrel, a striking element having rigid connection with the barrel, an actuating member in the barrel, coil springs confined between said actuating member and the ends of said barrel, a tubular guide slidably receiving and encasing said barrel, a power unit rigidly connected to the rear end of said tubular guide and being in longitudinal alignment therewith, said power unit being provided with an axially movable rod having driving connection with said springs.

3. A portable bit-dressing tool for use in oil well operations comprising a power unit, a striking unit connected to said power unit and being in alignment therewith, means connected to the tool intermediate the ends thereof for supporting the same for universal movement whereby the striking unit may be adj usted with respect to a bit to be dressed, and a handle connected to the power unit and forming a means whereby an operator may adjust g1: tool about a horizontal or vertical axis or 4. A portable bit-dressing tool comprising a substantial cylindrical striking unit, a power unit of substantially cylindrical formation connected to said striking. unit and being in alignment therewith, a yoke supporting said first and second named units for movement about a horizontal axis, and a flexible support for the yoke.

5. A portable bit-dressing tool comprising a substantial cylindrical striking unit, a power unit of substantially cylindrical formation connected to said striking unit and being in alignment therewith, a yoke supporting said first and second named units for movement about a horizontal axis, there being means whereby said first and second named units may be held in adjusted position, and an anchoring rod having universal connection with said yoke.

6. A portable bit-dressing tool comprising a substantial cylindrical striking unit, a power unit of substantially cylindrical formation connected to said striking unit and being in alignment therewith, a yoke supporting said first and second named units for movement about a horizontal axis, there being means whereby said first and second named units may be held in adjusted position, and universal and mobile suspension means for said yoke.

7. A portable bit-dressing hammer comprising a. bit working assembly, a yoke sup porting the bit working assembly for movement about a horizontal axis and extending below the same, a universal member having connection with the yoke, and an anchoring device adjustably connected to the universal member.

8. A portable bit-dressing hammer comprising a bit working assembly, an anchoring rod having means whereby the same may be connected to a relatively fixed object, a universal member threaded on said rod, means connecting said universal member to said bit working assembly, and a universal hanger for the bit working assembly.

9. A bit-dressing tool comprising a body, a clevis supporting the body and having extensions, a collar having trunnions connected to said extensions, a bearing member connected to the collar, an adjusting member having a sleeve extending through the bearing member, and an anchoring hook extending through the sleeve and having means whereby the same may be anchored to a relatively fixed object.

10. A bit-dressin g apparatus comprising a support, flexible means connected to and depending from the support, a hammer, ham mer carrying means connected to and depending from said first means, a universal joint carried by the hammer carrying means, and an anchor connected to the universal joint.

11. A bit-dressing apparatus comprising a support, flexible means connected to and de pending from the support, a hammer, hammer-carrying means connected to and depending from said first means, a universal joint carried by the hammer-carrying means, and an anchor adjustably connected to the universal joint.

12. A bit-dressing apparatus comprising a hammer, a hammer carried adapted to be suspended from a support, and means having a pivotal connection with the carrier and adapted to be engaged with a fixed object.

13. A bit-dressing apparatus comprising a hammer, a hammer carrier adapted to be suspended from a support, and means having a universal connection with the carrier and adapted to be engaged with a fixed object.

14. A bit-dressing apparatus comprising a hammer, a hammer carrier adapted to be suspended from a support, a universal joint carried by the carrier, and means adj ustably connected to the universal joint and adapted to be engaged With a fixed object.

15. A bit sharpener comprising a reciprocably mounted member, a die, means establishing a yielding connection between the hammer and member, and means for reciprocating the member and co-operating With said first means to offer a yielding resistance to the final phase of the movement of the die in each direction.

16. A bit'dressing apparatus comprising a hammer, means adapted to support the hammer for adjustment in an arcuate path having the Work for a center, and means adapted to permit said adjustment of the hammer and to hold it in adjusted position to the Work.

17 A bit-dressing apparatus comprising a hammer, means adapted to swingingly support the hammer for adjustment in an arcuate path having the Work for a center, and means adapted to permit said adjustment of the hammer and to hold it in adjusted position to the Work.

18. A bit-dressing apparatus comprising a hammer, means adapted to support the hammer for vertical adjustment With respect to the Work and for adjustment in an arcuate path having the Work for a center, and means adapted to permit said adjustment of the hammer and to hold it in adjusted position to the Work.

In testimony whereof I affix my signature.

CHARLES H. BERGQUIST. 

